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Texas Instruments TPS61141DRCT
- Part No.:
- TPS61141DRCT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS61141DRCT.pdf
- Description:
- IC LED DRV RGLTR PWM 35MA 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,781
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Product details
Overview
TPS61141DRCT from Texas Instruments is a dual-output boost regulator IC designed for clamshell mobile phones with OLED sub-displays and WLED-backlit LCD main displays. It delivers up to 27 V on voltage output (VOUT), up to 22 V overvoltage protection threshold, and supports 0.7-A integrated N-channel MOSFET switching with built-in power diode. Its PFM mode enables high-efficiency OLED supply; PWM mode at 1.2 MHz drives WLED current with dimming control via SELI pin.
For engineers reviewing the TPS61141DRCT datasheet, TPS61141DRCT pinout, TPS61141DRCT application, or TPS61141DRCT equivalent, key selection considerations include its dual-mode regulation (PFM for VOUT, PWM for IOUT), 10-pin 3×3 mm QFN package with exposed thermal pad, 2.5–6 V input range, and dedicated SELV/SELI control for independent output enable/dimming - critical for space-constrained portable display power designs.
Technical Context
The TPS61141DRCT uses a single-inductor dual-output architecture where one boost stage pre-regulates power for both a low-dropout linear regulator (LDO) supplying VOUT and a low-side current sink regulating IOUT. Feedback selection is dynamic: in BOTH-ON mode, it prioritizes the smaller of (IOUT–VOUT) voltage drop or IFB voltage to minimize linear-stage losses.
Its control logic implements PFM for VOUT-only operation (enabling >82% efficiency at light loads) and fixed-frequency 1.2-MHz PWM for IOUT-only mode (ensuring stable WLED current and supporting up to 30 kHz PWM dimming). Overvoltage protection triggers at 22 V (TPS61141-specific), undervoltage lockout activates below 1.65 V, and thermal shutdown engages at 160°C with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 6 V - supports single-cell Li-ion (3.0–4.2 V) and dual-cell alkaline/NiMH (2.4–3.6 V) inputs without external regulators. |
| VOUT Max Output Voltage | Up to 27 V - programmable via external resistor divider on VFB pin; enables driving multi-series OLED panels. |
| IOUT Max Output Voltage | Up to 22 V - limited by TPS61141-specific OVP threshold; ensures safe operation with 25-V-rated output capacitors. |
| Switch Current Limit | 0.40–0.70 A - adjustable via input voltage and duty cycle; sets maximum WLED string current under PWM mode. |
| Efficiency | Up to 82% - achieved in PFM mode at mid-load; LDO contributes ~2% loss at 15 V output due to headroom optimization. |
| Dimming Frequency Support | Up to 30 kHz - enabled by disabling soft start during SELI PWM; avoids audible noise from inductor/capacitor vibration. |
| Package | 10-pin QFN, 3 mm × 3 mm, 0.5 mm pitch, exposed thermal pad - requires soldering to analog ground for thermal management. |
Pinout & Package
TPS61141DRCT is housed in a 10-pin, 3 mm × 3 mm QFN package with an exposed thermal pad that must be soldered to analog ground for thermal dissipation. Pin functions are validated per TI SLVS624B datasheet (Rev. March 2007).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Voltage output terminal | Regulated output from internal LDO; disconnected from IOUT when LDO is disabled; requires external capacitor (≥1 µF) for ripple suppression. |
| VFB (Pin 2) | Voltage feedback input | Senses divided output voltage; regulated to 1.229 V reference; sets VOUT via R1/R2 divider per equation VOUT = VFB × (R1 + R2)/R2. |
| SELV (Pin 3) | Voltage output enable | Logic-high enables VOUT; logic-low disables VOUT and LDO; internal 300–700 kΩ pull-down prevents floating. |
| SELI (Pin 4) | Current output enable/dimming | Logic-high enables IOUT; PWM signal here modulates average WLED current; soft start disabled for linearity above 40 ms edge spacing. |
| VIN (Pin 5) | Main power input | Supplies boost converter and internal circuitry; UVLO triggers at 1.65 V falling; absolute max 7 V. |
| SW (Pin 6) | Switch node | Connects to inductor and internal N-FET drain; carries high dv/dt switching waveform; requires tight layout to minimize EMI. |
| IOUT (Pin 7) | Current output terminal | Boost output feeding current sink; supplies WLED strings; voltage follows IOUT–VOUT regulation threshold (330 mV typical). |
| GND (Pin 8) | Ground reference | Analog and power ground; input/output capacitors must connect directly here to minimize noise and ensure stability. |
| ISET (Pin 9) | Current programming input | Sets regulated IOUT via external resistor; IOUT = (1.229 V / RSET) × KISET (KISET = 900 typ); bias current <100 nA. |
| IFB (Pin 10) | Current feedback input | Feedback node for current sink regulation; regulated to 330 mV; open-circuit disables current regulation; leakage <1 µA at 25 V. |
Key Features
| Feature | Design Value |
|---|---|
| Single-inductor dual-output topology | Reduces BOM count and PCB area vs. two separate boost converters; eliminates need for second inductor and associated magnetics. |
| Mode-selectable regulation (PFM/PWM) | PFM for VOUT-only maximizes light-load efficiency (>82% at 2 mA); PWM at 1.2 MHz for IOUT-only ensures low-current ripple and precise dimming control. |
| Dedicated SELV/SELI control pins | Enables independent on/off sequencing - e.g., OLED active while WLED off, or simultaneous startup with soft-start coordination to prevent voltage dip. |
| Built-in 0.7-A N-FET and power diode | Eliminates external active components; reduces design complexity and failure points; rDS(on) = 0.6–0.9 Ω at 3.6 V gate drive. |
| Integrated OVP, UVLO, and thermal shutdown | OVP at 22 V (TPS61141-specific) protects 25-V capacitors; UVLO at 1.65 V prevents erratic startup; thermal shutdown at 160°C with 15°C hysteresis ensures reliability. |
Applications
| Clamshell Mobile Phone Display Power | OLED Sub-display Supply |
|---|---|
|
Use Scenario: Dual-screen clamshell phone requiring independent power for OLED sub-display (low-current, low-noise) and WLED-backlit LCD main display (high-current, dimmable). IC Role / Device Role / Timing Role: TPS61141DRCT acts as primary display power manager - generating regulated VOUT for OLED pixel drivers and constant-current IOUT for WLED strings using shared boost stage. Use Value: Single-chip solution replaces two discrete boost converters; PFM mode cuts quiescent current during standby; PWM dimming enables smooth brightness control without color shift. |
Use Scenario: Low-power, high-contrast OLED panel in handheld devices where supply ripple and transient response directly impact image quality. IC Role / Device Role / Timing Role: TPS61141DRCT provides ultra-low-noise VOUT via LDO post-regulation; PFM control maintains >80% efficiency across 2–20 mA load range. Use Value: LDO's 20 dB PSRR attenuates boost ripple; soft-start limits inrush; 15 V output supports 3–4 series OLED pixels with margin for aging. |
| WLED Backlight Driver | Portable Medical Display Power |
|
Use Scenario: White LED backlight for small-form-factor LCDs in consumer electronics, requiring precise current matching and flicker-free dimming. IC Role / Device Role / Timing Role: TPS61141DRCT regulates IOUT with 1.2-MHz PWM control; SELI pin accepts external 20–30 kHz PWM signal for analog-equivalent dimming. Use Value: Fixed-frequency PWM ensures consistent current accuracy; current sink settles in 6 µs; supports up to 6-series WLED strings at 22 V max. |
Use Scenario: Battery-powered medical monitor with dual displays needing reliable, low-noise, and lifecycle-stable power for critical diagnostics UI. IC Role / Device Role / Timing Role: TPS61141DRCT delivers isolated, independently controllable outputs - VOUT powers OLED status indicators; IOUT drives diagnostic backlight with fail-safe OVP/UVLO. Use Value: Input-to-output isolation prevents fault propagation; 2.5–6 V range accommodates aging batteries; -40°C to 85°C rating ensures field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output display power applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61140DRCT | Higher OVP threshold (28 V vs. 22 V); identical pinout, package, and functional architecture. | Supports higher-voltage WLED strings (e.g., 7+ series) but requires ≥25-V output capacitors; less margin for 25-V-rated components. | Select TPS61140DRCT only if system-level OVP tolerance exceeds 22 V and 25-V capacitors are used. |
| RT9397BF | Single-output WLED driver (no VOUT LDO); 1.5-MHz PWM; no PFM mode; different pinout and control interface. | Lacks independent OLED voltage rail; requires external LDO for dual-rail systems; simpler for WLED-only designs. | Choose RT9397BF only when OLED supply is handled separately and board space allows discrete LDO integration. |
Compared with TPS61141DRCT, TPS61140DRCT offers higher OVP headroom but tighter capacitor voltage margin, while RT9397BF sacrifices dual-rail integration for lower cost and reduced complexity in WLED-centric applications - neither is pin-compatible, and both require PCB layout changes.
Availability
TPS61141DRCT is available at Aetrix Electronics and suitable for clamshell mobile phones, portable medical displays, handheld test equipment, and industrial HMI panels requiring stable component supply with guaranteed long-term availability.
Supply support for TPS61141DRCT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management ICs, with decades of expertise in high-efficiency DC/DC conversion and display power solutions.
The TPS6114x family was designed specifically for dual-rail portable display power - integrating boost, LDO, and current sink into one QFN to replace discrete solutions in space-constrained clamshell and slider phones.
FAQ
What is the overvoltage protection (OVP) threshold for TPS61141DRCT?
The TPS61141DRCT has a fixed overvoltage protection threshold of 22 V, as specified in the Ordering Information table of the TI SLVS624B datasheet. This value is device-specific and differs from the 28 V OVP of the TPS61140DRCT variant. The OVP circuit halts switching immediately upon detecting IOUT voltage exceeding 22 V, preventing damage to downstream components such as 25-V-rated output capacitors. Recovery occurs automatically once the voltage falls below the hysteresis level of 440 mV.
How does TPS61141DRCT regulate both voltage and current outputs simultaneously?
The TPS61141DRCT uses a single boost converter to generate a pre-regulated rail, then applies two independent linear stages: an LDO for VOUT and a low-side current sink for IOUT. In BOTH-ON mode, the boost controller dynamically selects feedback between (IOUT–VOUT) voltage drop and IFB pin voltage - choosing the smaller value to minimize power loss across both linear elements. This ensures optimal headroom for both outputs while maintaining regulation accuracy within ±3% for VOUT and ±5% for IOUT under full load.
Can TPS61141DRCT drive more than four WLEDs in series?
Yes, TPS61141DRCT can drive up to six WLEDs in series, provided the total forward voltage remains ≤22 V - its maximum IOUT output voltage limit. For example, with typical 3.5 V/WLED, six LEDs require 21 V, staying within specification. The datasheet Figure 6 confirms >75% efficiency at 23 V WLED voltage (6-series) with 3.6 V input. Exceeding 22 V risks triggering OVP shutdown, so string voltage must be verified against worst-case forward voltage and temperature drift.
What is the purpose of the IFB pin on TPS61141DRCT?
The IFB pin on TPS61141DRCT serves as the feedback node for the current sink regulation loop. It is internally regulated to 330 mV, and the current sink adjusts IOUT to maintain this voltage across the external sense path. Opening the IFB connection disables current regulation, allowing the device to operate in VOUT-only mode. Its leakage current is <1 µA at 25 V, ensuring minimal error in precision current setting - critical for consistent WLED brightness across temperature and unit variance.
Does TPS61141DRCT require external compensation components?
No, TPS61141DRCT does not require external compensation components. Its internal PWM and PFM control loops are factory-compensated for stability with the recommended external components listed in the Typical Application circuit: 10 µH inductor, 4.7 µF input capacitor, 1 µF VOUT capacitor, and 4.7 µF IOUT capacitor. Deviating from these values - especially inductor tolerance (±20%) or capacitor ESR - may affect loop stability or transient response, but no additional RC networks or compensation pins are present on the IC.
TPS61141DRCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 2
- Voltage - Supply (Min):
- 2.5V
- Voltage - Supply (Max):
- 6V
- Voltage - Output:
- 27V
- Current - Output / Channel:
- 35mA
- Frequency:
- 1.2MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS61141DRCT FAQ
1.How can I place an order for TPS61141DRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61141DRCT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS61141DRCT reliable?
The price and inventory of TPS61141DRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61141DRCT is usually 5 days.
3.What payment methods are accepted for TPS61141DRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61141DRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61141DRCT?
TPS61141DRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61141DRCT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS61141DRCT?
For technical support, including TPS61141DRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61141DRCT requirements.
6.How does Aetrix verify that TPS61141DRCT is sourced from the original manufacturer or authorized distributors?
All TPS61141DRCT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS61141DRCT meets industry standards.
7.What is the process for return or replacement of TPS61141DRCT?
All TPS61141DRCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61141DRCT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS61141DRCT part is unused and in its original packaging.
Return procedure for TPS61141DRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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